Austin Chalk Formation - Austin Chalk Map - South Texas Oil & Natural Gas

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Austin Chalk Formation - Austin Chalk Map - South Texas Oil & Natural Gas

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What is the Austin Chalk formation?  The Austin Chalk formation stretches across numerous fields in Texas, Louisiana and a small portion of Mississippi.  The Austin Chalk is currently producing Natural Gas and Oil.  Companies drilling the Austin Chalk are having huge success and are also finding other oil & natural gas rich zones such as the Eagle Ford Shale.  The Austin Chalk formation reaches 500 km in length and 50 km in width.   The first wells drilled in the Austin chalk were drilled in the 1920’s.  Initially, vertical drilling was the only technique used to reach the Austin Chalk reservoirs, but as horizontal drilling came about, they changed the primary technique as horizontal drilling significantly enhanced the productivity of the wells by intersecting multiple fracture sets.  Austin Chalk ranges in thickness from 15 to 180 meters. It lies just above the Eagle Ford shale, yet below the Dessau formation.  The average targeted depth is roughly 1700 meters.   

The Austin Chalk formation can be found in the following counties in Texas:

Fayette County, Washington County, Burleson County, Brazos County, Grimes County, Montgomery County, Gonzales, Wilson, Karnes, Grayson County, Limestone County, Bell County, Silliamson County, Travis County, Medina County, Uvalde County, Bexar County, fayette County, Lee County Texas, Colorado County, Austin County, Milam County, Robertson County, Jasper  County and Newton County 

The Austin Chalk formation can also be found in the Vernon and Rapides Parishes of Louisiana. 

Austin Chalk Formation Map
Austin Chalk
Austin Chalk Trend

Companies Drilling in the Austin Chalk Formation - Austin Chalk Stocks

EV Energy Partners (EVEP) has drilled eight wells in the Austin Chalk in 2010 alone this year.  They have two rigs running, one in Central Texas chalk and on in the Brooklyn area, which is in Jasper County. Their plans for the year include drilling 5 - 7 more wells by the end of 2010.  EV Energy is currently executing a refrac program at a pace of about one well a week in the Austin Chalk.  The fracs generally increase production somewhere between 300 and 500 Mcf a day and 30 to 150 barrels a day.

 

Swift Energy Co. (SFY) -   Swift Energy SFY Austin Chalk Formation - In the Company's Central Louisiana/East Texas core area, one operated well and one non-operated well were drilled, both targeting the Austin Chalk formation in the Burr Ferry field in Vernon Parish, LA.

The GASRS 16-1 well, a non-operated well, was completed in the Austin Chalk and had an initial production rate of 207 bbls/d of oil and 1.3 MMcfg/d with flowing casing pressure of 1,250 psi on a 25/64" choke. This well, drilled near the southern extent of the Company's joint operating area, encountered fewer natural fractures than the wells drilled farther north have encountered. This well is important in understanding the geology in the area, which is essential to future development plans.

The Swift Energy operated GASRS 20-1 finished drilling operations during the third quarter and was completed in the Austin Chalk. A mechanical problem occurred during the initial cleanup of the well that required a workover rig to resolve. A workover rig is currently on this well and work is underway to remedy the issue. This well bore remained in zone for the extent of the 4,254 foot lateral and encountered high natural fracture density and strong tubing pressure.

Evolution Petroleum EPM -  In early July, we announced a joint venture with an industry partner to drill up to five horizontal development wells in the Giddings Field. This is from our portfolio in the Austin Chalk and Georgetown formations in Burleson and Grimes County in Central Texas.  We’re drilling the well as an operator. We have a 20% working interest before payout and a 38% working interest after payout and a 38% working interest after payout. We’d only pay 10% of the drilling and completion costs.  We spudded the first well in August in Burleson County, the Supak Brinkman, it’s a $1.7 million re-entry operation with 3,800 foot long Austin Chalk collateral in two existing well bore.  The second well in the JV, the $2.9 million, grass roots well located at Northern Bryan County. Our expected net capital expenditures for the five well program are about $1.2 million, and if we drill all five wells, we’ll be completed sometime in early spring of 2011.

Anadarko Petroleum  APC - Austin Chalk:  Drilling activity continued with four operated rigs. Anadarko spud eight wells.  During the quarter, the company spud the eleventh well of a 25-well planned re-entry program in the Northstars field, with encouraging results.

GeoResources GEOI - AUSTIN CHALK

During the Second Quarter of 2010, the Company has completed the Chappel Wood #1-H (47% WI) and the Wilkerson Davis Unit #1-H (52% WI). Our Chappel Woods well was successfully drilled as a dual lateral. The well was brought on production in May, initially tested at over 21 Mmcfed, but fell off to current production of only about 2.5 Mmcfed. Production is inconsistent with shows while drilling, indicative, we believe, of a down-hole restriction. Therefore, we have scheduled a slick water frac which should occur in July or early August. Wilkerson Davis was successfully completed. The well was brought on to production within the past week with an IP of 620 BOPD and 1,226 Mcfd.  

To date, the Company has drilled 16 Austin Chalk wells and achieved a 100% success rate. Our present inventory includes 20 proved undeveloped and probable locations within the Giddings Field. Our working interest varies from 37% to 53%.   With low gas prices, we have decided to release our Austin Chalk rig and work to accelerate our oil projects.  Accordingly, we will defer Austin Chalk drilling until natural gas prices increase. We are in no jeopardy of losing leasehold positions. Our acreage position exceeds 68,000 gross acres, a majority of which is held by production and is prospective for the shallow Yegua and for the Eagle Ford Shale, Buda and Georgetown Formations.

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